Bearing adjuster



Jan. s, 1929. f 1,698,614

I F. M. WATKINS ET AL BEARING AnJsTER Filed sept. 20, 192.6

ATTORNEY l similar Patented Jan. 8, 1.929.

vUNITED srrs BEARING ADJUSTER.

Application led September 20, 1926. Serial No. 136,610.

` V It is the purpose of this invention to provide a novel constructionof means for tightening and keeping in adjustment, the wrist pin bearingblock of the character used on all standard pumping and drillingapparatus used in oil fields and the like.

In carrying out the invention I contemplate a structure which can beused with either wooden or metallic bearing blocks, and also'provide forthe supporting of the bearing block within the pitman when the latter isremoved from the wrist pin on the crank band wheel shaft of theapparatus.

The nature and advantages of the invention will be betterV understoodwhen the following detail description isread in connection with theaccompanying drawings, the invention residing in the construction,combination and arrangement of parts as claimed.

In the drawings forming part of this application like numerals ofreference indicate parts in the several views and wherein: f

Figure 1 is a view in elevation showing one embodiment of the invention.

Figure 2 is a vertical sectional view therethrough. l

Figure 3 is a perspective view of the follower.

Referring to the drawings in detail and more particularly Figures 1 to 3inclusive, 10 represents a pitman which, is slotted to accommodate thebearingv blocks for the wrist pin 11. The lower block of thebearingindicated at 12 is stationary., while the upper block 13 is susceptibleof adjustment so that it may be tightened from time to time as theoccasion may require, and held fixed relatively to the block 13 in anygiven position. As shown in these figures, the bearing blocks areconstructed of metal, although it is desired to be understood that saidblocks may be formed from any material without departing from the spiritof the invention. The block 13 Varies from the block of usualconstruction, in that it is channeled as as 14 and provided with a slotalong theupper edge thereof to accommodate the form of followerindicated at 15 in Figure 3. A metallic bearing plate 16 straddles theupper edge of the slot in the pitman 10 as illustrated, and the upperedge of the follower is beveled or inclined as at 17 to ride or bearagainst the plate 16, which is arranged at an angle as illustrated. Thefollower is formed with a substantially T- shaped extension 18 which isreceived by a correspondingly shaped slot 18 formed in the adjacent endof the block 13, with the head of the extension arranged within thechannel portion 14 as clearly illustrated in Figure 2. The follower isprovided with a threaded bore 19 which receives an adjusting screw 20which is journaledV in the pitman 10 and provided with a crank handle21, through `the instrumentality of which the screw is rotated. Theinitial position of the follower 15 is illustrated-in Figure 1, and whenit is desired to tighten the bearing block 13 it is only necessary torotate the screw 20, to feed the follower along the screw, the inclinedface 17 thereof riding against the lower edge -of the angular bearingplate 16 causes the block 13 to be lowered and tightened as will bereadily understood. In this manner the bearing can be quickly andconveniently adjusted, and the block 13 held fixed with relation to theblock 12 in any given position. By reversing the rotation of the screw20, the

follower is moved in an opposite direction, v

which of course loosens the bearing block 13 to permit ythe pitman to beseparated from the crank pin 11, and by reason of the construction ofthe follower 15, and its association with the bearing block 1.3, thelatter Vis supportedv within the opening of the pitman after the latterhas been removed from the crank pin.

While lit is believed that from the foregoing description, the natureand advantages of the invention will be readily apparent, we desire tohave it understood, that we do not limit ourselves to what is hereinshown and described and that such. changes may be resorted to whendesired as fall within the scope of what is claimed.

What is claimed is:

A wrist pin bearing comprising in combination with a support and bearingblocks mounted therein, one of said blocks having an opening adjacentits upper endL and having its upper surface provided'with a slotcommunicating with said opening, an adjusting screw journaled on saidsupport above'said lblook, a follower mounted on said screw andincluding a substantially inverted T-shaped extension the stem of whichis adapted to pass through said slot, to support said ing with saidplate whereupon adjustment of said block is effected upon movement ofthe follower in one direction. Y v 10 In testimony whereof we afiX oursignatures.

FRANCIS MARION WATKINSL RAY CUNNINGHAM.v

